Stockholders' Equity (Components Of Other Comprehensive Income) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Equity [Abstract]
Net income	$ 774	$ 398	$ 1,301	$ 228
Less: net loss attributable to non-controlling interests	4	0	6	0
Net income	778	398	1,307	228
Other comprehensive income (loss):
Currency translation adjustments (net of tax of $(14), $3, $(17) and $(9), respectively)	(50)	15	(43)	1
Net unrealized gain (loss) on cash flow hedges (net of tax of $(4), $(10), $(15) and $(7), respectively)	13	(14)	43	21
Minimum pension liability adjustment (net of tax of $0, $0, $0 and $0, respectively)	1	1	3	4
Other comprehensive income (loss)	(36)	2	3	26
Comprehensive income attributable to Avis Budget Group, Inc.	742	400	1,310	254
Currency translation adjustments, tax	(14)	3	(17)	(9)
Net unrealized gain (loss) on cash flow hedges, tax	(4)	(10)	(15)	(7)
Minimum pension liability adjustment, tax	$ 0	$ 0	$ 0	$ 0